Question

4 solve the equation.
$8x + 9.8 = 106.6$
$x = \boxed{}$

5 solve the equation.
$-4.9 + \frac{b}{5} = -3.88$
$b = \boxed{}$

6 solve the equation.
$-2x + 7.1 = 35.1$
$x = \boxed{}$

Explanation:

Question 4

Step1: Subtract 9.8 from both sides

$8x + 9.8 - 9.8 = 106.6 - 9.8$
$8x = 96.8$

Step2: Divide both sides by 8

$x = \frac{96.8}{8}$
$x = 12.1$

Step1: Add 4.9 to both sides

$-4.9 + \frac{b}{5} + 4.9 = -3.88 + 4.9$
$\frac{b}{5} = 1.02$

Step2: Multiply both sides by 5

$b = 1.02 \times 5$
$b = 5.1$

Step1: Subtract 7.1 from both sides

$-2x + 7.1 - 7.1 = 35.1 - 7.1$
$-2x = 28$

Step2: Divide both sides by -2

$x = \frac{28}{-2}$
$x = -14$

Answer:

$12.1$

Question 5